Question

write about digestive system of cockroach in a short way to get good marks

Answer 1

here is mentioned short digestive system of coackroach

Digestion Process
Digestion begins first at the mouth where the parts like mandibles and maxillae help to chew the food.  The part named salivary carbohydrases digests food to a partial extent. The saliva juice lubricates the food and helps to swallow it. Later the food moves to the esophagus and then onto the crop. This is the point where food in its masticated form is stored temporarily. The next point where the food moves would be at the gizzard where it’s grinding takes place. There is a valve named stomodeal right at the joint of the stomach and gizzard.

The regurgitation of food would be prevented by this valve while ensuring smooth passage of food in the stomach. The food once entering the stomach are treated by the digestive enzymes created by the gastric caecae. The enzymes include invertase, amylase, tryptase, maltase, and lipase. The residual fats, proteins, and carbohydrates would be absorbed here.